<template>
  <el-container class="home-container">
    <!-- 头部区域 -->
    <el-header>
      <div>
        <img src="../assets/logo.png" alt="" />
        <span>电商管理后台系统</span>
      </div>
      <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!-- 页面主体区域 -->
    <el-container>
      <!-- 侧边栏 -->
      <el-aside :width="isCollapse ? '64px' : '200px'">
        <div class="toggle-button" @click="toggleCollapse">
          <i class="el-icon-s-operation"></i>
        </div>
        <!-- 侧边栏菜单 -->
        <el-menu
          background-color="#333744"
          text-color="#fff"
          active-text-color="#409EEF"
          unique-opened
          :collapse="isCollapse"
          :collapse-transition="false"
          router
          :default-active="activePath"
        >
          <!-- 一级菜单 -->
          <el-submenu
            :index="menuItem.id + ''"
            v-for="menuItem in menuList"
            :key="menuItem.id"
          >
            <!-- 一级菜单的模板区域 -->
            <template slot="title">
              <!-- 图标 -->
              <i :class="iconObj[menuItem.id]"></i>
              <span>{{ menuItem.authName }}</span>
            </template>
            <!-- 二级菜单 -->
            <el-menu-item
              :index="'/' + subMenuItem.path"
              v-for="subMenuItem in menuItem.children"
              :key="subMenuItem.id"
              @click="saveNavState('/' + subMenuItem.path)"
            >
              <template slot="title">
                <!-- 图标 -->
                <i class="el-icon-menu"></i>
                <span>{{ subMenuItem.authName }}</span>
              </template>
            </el-menu-item>
          </el-submenu>
        </el-menu>
      </el-aside>
      <!-- 右面内容区域 -->
      <el-main><router-view></router-view></el-main>
    </el-container>
  </el-container>
</template>
<script>
export default {
  data() {
    return {
      // 左侧菜单数据
      menuList: [],
      iconObj: {
        125: "el-icon-s-custom",
        103: "el-icon-s-help",
        101: "el-icon-s-goods",
        102: "el-icon-s-goods",
        145: "el-icon-s-marketing",
      },
      // 是否折叠
      isCollapse: false,
      // 被激活的链接地址
      activePath: "",
    };
  },
  created() {
    this.getMenuList();
    this.activePath = window.sessionStorage.getItem("activePath");
  },
  methods: {
    logout() {
      // 清空sessionStorage的值  跳转到登录页面
      window.sessionStorage.clear();
      this.$router.push("./login");
    },
    // 获取所有菜单
    async getMenuList() {
      const { data: res } = await this.$http.get("menus");
      if (res.meta.status !== 200) return this.$message.error(res.meta.msg);
      this.menuList = res.data;
    },
    // 点击按钮奇幻菜单的折叠与展开
    toggleCollapse() {
      this.isCollapse = !this.isCollapse;
    },
    // 保存链接的激活状态
    saveNavState(activePath) {
      window.sessionStorage.setItem("activePath", activePath);
    },
  },
};
</script>
<style lang="scss" scoped>
.home-container {
  height: 100vh;
  .el-header {
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    div {
      display: flex;
      align-items: center;
    }
    div > img {
      width: 10%;
      padding-left: 0px;
    }
    div > span {
      color: #fff;
      font-size: 20px;
      margin-left: 15px;
    }
    .el-button {
      margin: 10px;
    }
  }
  .el-aside {
    background-color: #333744;
    .el-menu {
      border-right: none;
    }
  }
  .el-main {
    background-color: #eaedf1;
  }
}
.toggle-button {
  background-color: #4a5064;
  color: #fff;
  text-align: center;
}
</style>
